building. israeli officials say hamas is using civilian buildings as cover to launch rockets across the border. in tel aviv, people on the street ran for cover when sirens signaled an approaching rocket. israel's iron-dome defense system has intercepted more than 240 rockets. during a trip to asia, president obama warned israel about expanding into a ground war, but he defended israel, fighting back. >> there's no country on earth that would tolerate missiles raining down on its citizens from outside its borders. >> reporter: u.n. supreme cour general ban ki-moon is there today. thousands of tanks and rocket launchers are waiting to cross the border. so cease-fire talks continue in egypt and the president says we'll have to see how much progress can be made in the next 24, 36, 48 hours. terrell? >> susan mcginnis in washington, starting us off this morning. susan, thank you so much. >>> speaking of the president, this morning he became the first american president to visit the asian nation of burma, a country known for its repressive military rule. the president's brief six-hour vis